gryf/wmaker
1
0
Fork 0
mirror of https://github.com/gryf/wmaker.git synced 2025-12-19 04:20:27 +01:00
Code Issues Projects Releases Wiki Activity

fix overflow bug, try2

Browse Source
This commit is contained in:
kojima
2002-11-08 17:05:35 +00:00
parent 60ee69979f
commit 811e508c84
1 changed files with 5 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
wrlib/raster.c
View File

@@ -43,11 +43,14 @@ RImage*
RCreateImage(unsigned width, unsigned height, int alpha)
{
RImage *image=NULL;
unsigned bla1, bla2;
assert(width>0 && height>0);
/* check for too large images (cap on INT_MAX just to be sure :P) */
if (width > (INT_MAX/4)/height+4) {
/* detect overflow (gr33tz to ruda :D) */
bla1 = width*height;
bla2 = bla1*4;
if (bla1/height != width || bla2/4 != bla1 || bla2 > INT_MAX-32) {
RErrorCode = RERR_NOMEMORY;
return NULL;
}